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APR - ECU software upgrade

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Old 08-27-2014, 06:45 AM   #1
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Default APR - ECU software upgrade

What do you guys think of a Software upgrade for the S8?

APR gives you 471hp and 427ft/lbs but also gains of up to 26hp in some area of the rpm range. It costs $925

APR Audi S8 5.2L V10 FSI - APR ECU Upgrade

Is it worth it?
Is the increase felt?
At what cost... engine lifespan?
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Old 08-27-2014, 07:50 AM   #2
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I would have to see that engine on a test bench before and after in order to believe.

If it is true I am not sure that it would make noticeable difference. On top of 450 HP you need at least 100 more to feel a real kick. Any improvement on a naturally aspirated engines (assuming that Audi engineers know what they are doing) can come at the consumption price. That one you can fell easily.
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Old 08-27-2014, 11:42 AM   #3
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I had thought about the APR tune and a Milltek exhaust for my 09'. Turns out I guess I am old now and enjoy the car pretty much as it is, acoustic glass and near quiet interior. Besides, the V10 is enough of a fuel hog, I'd hate to see this thing at 8-9mpg. Yeesh. Good luck if you decide to get it. For me, at this time, I'll give it a pass.
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Old 08-27-2014, 12:09 PM   #4
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I would have to see that engine on a test bench before and after in order to believe.

If it is true I am not sure that it would make noticeable difference. On top of 450 HP you need at least 100 more to feel a real kick. Any improvement on a naturally aspirated engines (assuming that Audi engineers know what they are doing) can come at the consumption price. That one you can fell easily.
510 HP on my CL and what really makes a huge difference is the torque, you will not even feel 20 HP more.
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Old 08-27-2014, 12:18 PM   #5
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510 HP on my CL and what really makes a huge difference is the torque, you will not even feel 20 HP more.
Is it 5.5 liter turbocharged V12?
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Old 08-27-2014, 12:20 PM   #6
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I was suggested the Milltek exhaust also, but I don't like the sound. I like the quieter and deeper S8 sound. Milltek seems great for a sports car, But the S8 is not really a sports car and the stock exhaust suits it perfectly.

I inquired about the software upgrade and they told me the fuel consumption will increase but only at higher revs. When I drive the car conservatively I shouldn't notice a difference. But for $925 I would like to notice a power difference.

I am getting the Carbon deposits cleaned out next week and that should show a significant improvement. I bought the car used with 120K so I have no idea how the intake valves look, nor do I have a reference to know if the performance is lacking. It feels great right but I don't know if it's supposed to be even better!

I'll share the before and after pictures taken of the valves.
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Old 08-27-2014, 01:49 PM   #7
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Is it 5.5 liter turbocharged V12?
it is
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Old 08-27-2014, 02:24 PM   #8
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it is
That makes it all different case. Turbocharged engines can get quite a bit power by ECU reprogramming. Price is lower millage and shorter engine life, but who cares.
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Old 08-27-2014, 02:27 PM   #9
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Quote:
Originally Posted by Bart247 View Post
I was suggested the Milltek exhaust also, but I don't like the sound. I like the quieter and deeper S8 sound. Milltek seems great for a sports car, But the S8 is not really a sports car and the stock exhaust suits it perfectly.

I inquired about the software upgrade and they told me the fuel consumption will increase but only at higher revs. When I drive the car conservatively I shouldn't notice a difference. But for $925 I would like to notice a power difference.

I am getting the Carbon deposits cleaned out next week and that should show a significant improvement. I bought the car used with 120K so I have no idea how the intake valves look, nor do I have a reference to know if the performance is lacking. It feels great right but I don't know if it's supposed to be even better!

I'll share the before and after pictures taken of the valves.
What kind of a bill will you be receiving for this job? I know it needs to be done on mine at some point. I am almost at 70K now, but haven't noticed any sort of loss of power yet.
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Old 08-27-2014, 06:15 PM   #10
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What kind of a bill will you be receiving for this job? I know it needs to be done on mine at some point. I am almost at 70K now, but haven't noticed any sort of loss of power yet.
Hi relatively new s8 d3 owner, had carbon clean when I bought my 2007 with 44k on it and it was about $800 hand scraped from J Ellis Audi here in Atlanta area. Noticeable improvement.

Also re APR ECU-upgrade, I stopped at their corp HQ in auburn Alabama on a trip to see my son who is in school there, ( actually to get my s8 back from him lol) and the upgrade was $799 with No guarantee that it would not throw any CEL codes. They typically offer $100 off several times a year on the $799 price. Not sure where $1200 above came from.

Hope that helps
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Old 08-27-2014, 07:13 PM   #11
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Hi relatively new s8 d3 owner, had carbon clean when I bought my 2007 with 44k on it and it was about $800 hand scraped from J Ellis Audi here in Atlanta area. Noticeable improvement.

Also re APR ECU-upgrade, I stopped at their corp HQ in auburn Alabama on a trip to see my son who is in school there, ( actually to get my s8 back from him lol) and the upgrade was $799 with No guarantee that it would not throw any CEL codes. They typically offer $100 off several times a year on the $799 price. Not sure where $1200 above came from.

Hope that helps
interesting, I'm curious how it was determined that you need a carbon cleaning, have you driven another S8 and compare it with yours or was the dealer advice. Any photos prior and after ? The reason I'm asking is because, frankly, you're only the second case, at least on this forum.
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Old 08-28-2014, 07:38 AM   #12
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I was quoted $650 CAD for the carbon cleaning at VAG Motorsports near Montreal. I drop the car off before work and pick it up after. They use the BMW method of Walnut Blasting which is quicker and cheaper than the manual approach which my Audi dealer uses and charges $2000 for!

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Old 08-28-2014, 10:02 AM   #13
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Originally Posted by Bart247 View Post
I was quoted $650 CAD for the carbon cleaning at VAG Motorsports near Montreal. I drop the car off before work and pick it up after. They use the BMW method of Walnut Blasting which is quicker and cheaper than the manual approach which my Audi dealer uses and charges $2000 for!

Walnut Blasting
REVIEW: Cleaning of intake valves with BMW walnut shell blasting tool

VAG Motorsport
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don't understand how it was determined that you were in need of the carbon cleaning procedure
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Old 08-31-2014, 10:42 PM   #14
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Naturally aspirated they are a total waste of money. They are only worth it if you have a turbo.
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Old 09-01-2014, 04:32 AM   #15
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Quote:
Originally Posted by tx170754 View Post
interesting, I'm curious how it was determined that you need a carbon cleaning, have you driven another S8 and compare it with yours or was the dealer advice. Any photos prior and after ? The reason I'm asking is because, frankly, you're only the second case, at least on this forum.
Sad but true…….and believe me, after spending $3700 to get the car up and running correctly, $800 of which was hand cleaning the carbon build up, I wish it were not so!

When I received the car, CEL came on in about a week, wouldn't pass emissions test to license it for the road, backfired, ran rough. Took it first to my independent guys who could not get all the issues ironed out so I took it to my Audi dealer here in Atlanta area, car had a number of issues so I had them go through the vehicle and get it in the kind of shape all my cars are (meaning everything in top working condition, nothing broken, top performance). Took perhaps 2-3 weeks. Never would have bought the car had the seller been honest with all the issues I found (Metrolina Auto Group Concord, N.C-NEVER buy a vehicle from those guys). All seals and gaskets had to be redone, ignition coils replaced, tune up, broken arm rest, trunk motor not working, broken armrest handle, etc. etc. Dealer called me over and showed me the carbon build up. Have all the pics but don't know how to post them here yet.

My wife's 2008 Porsche Cayenne GTS with the 4.7 FSI engine has the same issue but it has not reared it's ugly head yet with 65,000 miles on it. Have pics of that too.

So believe it, it is true.
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Old 09-01-2014, 04:37 AM   #16
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Default APR Visit to HQ's Auburn Alabama

Quote:
Originally Posted by Bart247 View Post
What do you guys think of a Software upgrade for the S8?

APR gives you 471hp and 427ft/lbs but also gains of up to 26hp in some area of the rpm range. It costs $925

APR Audi S8 5.2L V10 FSI - APR ECU Upgrade

Is it worth it?
Is the increase felt?
At what cost... engine lifespan?
APR will not guarantee no trigger of fault codes FYI…….I stopped by to talk with them while I was in Auburn (son goes to school there). So I have decided not to do the up-grade for that reason alone.
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Old 09-01-2014, 05:13 AM   #17
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The reprogram is worth something if the silly 155 mph speed limiter is deleted.
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Old 09-01-2014, 06:03 AM   #18
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The reprogram is worth something if the silly 155 mph speed limiter is deleted.
My understanding is that it is removed. How fast do we need to go now?
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Old 09-01-2014, 12:20 PM   #19
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My understanding is that it is removed. How fast do we need to go now?
Faster than a Challenger, Mustang GT, Chrysler 300 C or S, All BMW's etc.
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Old 09-05-2014, 10:25 AM   #20
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Default Carbon Cleaning

Here is a before and After pic of the Carbon Cleaning I had done.

I can’t believe how smoothly the car runs now! It’s a big difference. I didn't have a reference point and thought the car felt good before, but I really notice the difference. The car moves from stop much more smoothly now, before I was getting a huge jump forward I guess from enough air eventually flowing in, but now it flows without restraint and the car accelerates much more linearly.

I'm very happy I had this done.
Every 30,000K-50,000K from now on depending on how the car feels.
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Old 09-05-2014, 10:25 AM
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